<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <link rel="stylesheet" href="css/main.min.css">
    <title>{{title}} - gulp教程</title>
</head>
<body>
{{if header}}
<header>
    <h1>header</h1>
</header>
{{/if}}